Patent GB-191026225-A (GB)
Title: Improvements in Machines for Winding Armatures of Dynamo-electric Machines, and for analogous purposes.
Inventor: BROOKS BOULTBEE
IPC: H02K15/095
Filed: 1910-11-11
Granted: 1911-11-13
Abstract: 26,225. Brooks, B., and Alston, F. H. Nov. 11. Transformers. - A machine for winding armatures for dynamo - electric machines, particularly magneto machines, but applicable also for winding induction coils, bobbins, &c., comprises means for rotating the armature to be wound, with a traversing wire guide operated by a leading screw driven from the main shaft and adapted to follow the surface of the coil being wound. The coil 7, Fig. 1, is held in the chuck 6, and the screw 9 is driven through gearing (the ratio of which can be altered at will) from the shaft 1. The internally-threaded sleeve 10 moves to and fro according to the direction of rotation of the screw 9, and in its motion it takes with it the shaft 12, to which it is secured at 11. Mounted on the shaft 12 is a sleeve 15 carrying the guide arm 16, which tends to move away from the bobbin 7 but is kept against it by the tension of the wire, as shown in Fig. 7. The machine is shown in Fig. 1, in the stopped position, the belt fork 37 being opposite to the free pulley; on throwing it over, however, the belt comes on to the driving pulley 4, and at the same time the rocking lever 41 fixed to the spindle 38 is thrown over and engages, as shown in Fig. 7, beneath a catch 43 on the armature 44 of an electro-magnet 45, the winding of which is in series with a source of current, the ends of the circuit being clamped in binding screws, one of which is connected to the bridge 46, and the other of which is connected to the sleeve 15. Thus, whenever the guide 16 reaches a cheek of the bobbin, a finger 48 touches one side or the other of the bridge 46, completes the circuit, and energizes the magnet 45 to free the arm 41, whereupon the belt is moved back on to the loose pulley by the spring 42 through the arm 37. This stops the machine, and the same sequence of events happens if the projection 48 touches the top of the arch 46 as it would if the wire broke and allowed the arm 16 to swing out. By shaping the inner top curve of the arch 46 to correspond with the shape of the cross-section of the fully wound shuttle 7, the outer layers of windings are automatically wound in decreasing width, as the finger 48 touches the arch at each side sooner at the top of the arch than it does lower down. As the machine stops at the completion of each layer, the operator reverses the direction of rotation of the screw 9 by the device shown in Fig. 11. This consists of a rocker plate 21 turning about the shaft 26, and carrying two meshing pinions 22, 23; when the drive takes place through pinions 24, 23, 22, 25, 27, it is in the opposite sense from that when it takes place through pinions 24, 22, 25, 27. A catch plate 34 and catch handle 32 serve to lock the plate 21 in either one of the two positions indicated above, or in the neutral position shown in the drawings. A hand stopbutton may be provided. Faults in the winding may be detected during manufacture by having a current pass through the magnet coil, the coil being wound, and a galvanometer, so that should the wire break or a joint be made badly, the galvanometer will show it. To prevent the supply bobbin 52 from over-running, a brake may be provided, as described in Specification 11,170/08.